package wyg;

import java.util.Scanner;

public class ReflectSimble {


    public static void main(String[] args) {
        MathOperating mathOperating = null;
        Scanner sc = new Scanner(System.in);
        String kind = sc.next();
        try {
            mathOperating = (MathOperating) Class.forName("wyg." + kind).newInstance();
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println(mathOperating.operate(1, 2));
    }


}
